Thomas stubblefield



UNITED sTATEs PATENT oEErcE.

THOMAS STUBBLEFIELD, OF COLUMBUS, GEORGIA, ASSIGNOR TO HIMSELF AND PETERNAYLOR.

STOP-COCK.

Specification of Letters Patent No. 23,796, dated April 26, 1859.

To all whom it may concern:

Be it known that I, THOMAS STUBBLEFIELD, of Columbus, Muscogee county,in the State of Georgia, have invented certain new and usefulImprovements in Stop-Cocks; and I do hereby declare that the followingis a full, clear, and eXact description thereof, reference being had tothe accompanying drawings and to the letters of reference markedthereon.

The nature of my invention consists in so constructing the cap and leverof a stop cock that the lever may be made to answer the double purposeof lever to raise the valve from its seat, and a joint to preventleakage as will be hereinafter fully described.

Figure l represents a longitudinal vertical section. Fig. 2, is a crosssection of the lever and cap. Fig. 3, is also a section of the lever andcap in a different position.

In the drawings A, represents the body or shell of the cock, whichconsists of a barrel or chamber F, and tin pipes-an inlet pipe B and anoutlet pipe C. The chamber F, is located above the inlet pipe andconnects with it by means of an opening z', which is directly under itscenter. The outlet pipe connects with the side of the chamber F, near orat its bottom. A screw is cut in t-he top of the chamber F, and a cappiece I, having a screw cut on it is screwed into it. The cap I, isprovided with a semicircular opening into which lits the circular endII, of lever D. At the bottom of the opening in the cap is a slot o,`through which the valve stem a, passes for the purpose of connectingwith the end H, of lever D. The end of the valve stem passes into agroove in the end ol said lever, as is seen in Fig. 2, and is securelypivoted there.

c, c, represents a spiral spring which surrounds the valve stem. Theupper portion of this spring presses against the bottom ot the cap I. Tothe lower end of the spring is secured a disk m, in the center of whichis an opening in which is cut a screw. Near the lower end of the valvestem and forming a continuation of it, is pivoted a rod with a screw cuton it.

This screw passes into the screw cut in disk m, thus securing the springbetween the cap and the disk.

On the under side of the disk is placed a piece of rubber or leather,which is secured in position by means of a nut s, which passes over thelower end of the valve stem. Said rubber acts as a valve to close theOpening z'.

I do not propose to confine myself to spiral metallic springs as I mayuse india rubber, or any other suitable springmaterial, which will drawthe lever tight down to the cap,v

and keeping iterect and in proper position.

The bearing of the end of the lever, on the bottom of the opening in thecap, is clearly seen in the figures. The opening through the cap intothe chamber F, is not so wide as the semicircular opening in said cap,is seen in Fig. 2, and the end of the lever has a bearing all around inthe opening.

Fig. l shows the parts in position to 'stop the flow of liquids throughthe cock, while Fig. 3 shows the lever turned down to one side,compressing the spring and elevating the valve for the purpose ofallowing the liquid to pass through the cock. The end ot' the leverforms a tight joint with the opening in the cap,jand when once ground orlitted in, it has a constant tendency to keep itself ground in. Thespring it will be seen acts in both ways. It holds the valve in itsseat, and at the same time draws the lever down into the opening in thecap for the purpose of breaking the joint between them.

I-Iaving thus fully described my-invention what I claim as new anddesire to secure by Letters llatent isu The combination of the lever D,cap I, valve stem a, and spring o, when the cap I, is provided with asemicircular opening into which fits the semicircular end H, of lever D,for the purpose of forming a tight joint without packing substantiallyas is herein described. v

THOS. STUBBLEFIELD.

fitnesses C. M. ALEXANDER, T. I-I. ALEXANDER.

